How to stay dry inside a bivy during rain?

Preparing Your Shelter

Before heading into the rain, ensure your bivy sack is properly sealed and waterproof. Check for any tears or holes and repair them with a waterproof patch or tape. If you don’t have a waterproof bivy, consider using a space blanket as an emergency shelter.

Using a Space Blanket for Shelter

A space blanket can be used to create a makeshift shelter by draping it over a branch or a rock, and then covering yourself with it. This will help to keep you dry and retain body heat. To use the space blanket effectively, drape it over a branch at an angle, with the shiny side facing outwards to reflect rain. Then, cover yourself with it, making sure to keep your head and neck dry.

Maximizing Body Heat Retention

To stay dry and warm inside your bivy, wear wet-weather clothes that will help to keep you dry, such as a waterproof jacket and pants. Remove any excess clothing to prevent moisture buildup and wear a hat to retain body heat. Use a space blanket to cover yourself, and consider using a hot water bottle or a hand warmer to keep your body temperature up.